The aim of the Iranian Journal of Science and Technology is to foster the growth of scientific research among Iranian engineers and scientists and to provide a medium by means of which the fruits of these researches may be brought to the attention of the world’s scientific communities. The journal will accept the original research contributions (previously unpublished) from all areas of established engineering disciplines and the sciences. The papers may be theoretical, experimental or both. The editors will welcome papers from all countries in the hope that this will advance the scientific standards of the journal and provide a channel of communication between Iranian Scholars and their colleague in other parts of the world.